: You may need to gently pry open the tablet's casing to find the board identification number printed directly on the PCB (e.g., something like CB-M R U 94V-0 ).
For developers and manufacturers interested in exploring the Allwinner A133 firmware work, we recommend: allwinner+a133+firmware+work
: Recent community efforts are making significant strides in bringing "Mainline" Linux support to the A133. Developers are actively patching sunxi-fel (the tool used for booting Allwinner devices over USB) to correctly detect and interact with the A133. : You may need to gently pry open